How diamonds are created?

Answer 1

Loads of temperature changes in the upper mantle forces the carbon atoms to go deeper where it melts and finally becomes new rock, when the temperature reduces. If other conditions like pressure and chemistry is right then the carbon atoms in the melting crustal rock bond to build diamond crystals.

Answer 2

Diamonds are created under High Pressure and High Temperature (HPHT). Another method used in CVD (Chemical Vapor Deposition). HPHT recreates the same conditions that take place underearth for million years. The diamonds grown during several days. Let's say 3 days for one carat yellow diamond and up-to couple of weeks for five carats blue diamond. There are just a few companies in the world who really grows the diamonds. One of them in the link below. Jewelry diamonds are already available in the market and are offered by some retailers.

Mother nature creates diamonds deep within the earth's mantel, under ultra high pressure and extreme heat. They are thrust to the surface by volcanic pipes.

Answer 3

Diamonds are created deep within the earth's mantle under high pressure and temperature conditions. Carbon atoms are arranged in a crystal lattice structure to form diamonds. They are brought to the earth's surface through volcanic eruptions in a type of rock called kimberlite.